While it is not yet understood why a TX underflow can easily occur
for SGMII interfaces resulting in a TX wedge. It has been found that
disabling/re-enabling the LMAC resolves the issue.
Signed-off-by: NTim Harvey <tharvey@gateworks.com>
Reviewed-by: NRobert Jones <rjones@gateworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>